Islands born of fire run from the equatorial Atlantic down to Antarctica. Many are now home to unique species and all have intriguing stories to tell.
Atlantic Arks: From huge penguin, turtle and seabird colonies to the world's richest coral reefs, discover the UK's remarkable, distant, isolated territories. (1 of 2)
The island's glaciers fuel the flow of some of Canada's tallest waterfalls and a huge network of streams, creating the ideal habitat for the Pacific salmon. (2 of 4)
Fragments Of Paradise: Explore Britain's remote overseas territories, that are home to parrot fish, bright blue lizards and crabs that are big enough to eat coconuts. (2 of 2)